Cross-layer reconfiguration method for surviving multiple-link network failures
US8243586B2 · kind B2 · utility
1Cited by
10References
20Claims
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Key dates
| Filing date | Nov 24, 2009 |
| Grant date | Aug 14, 2012 |
| Priority date | — |
| Expiry date | Aug 14, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L41/06
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A second link in a network is reconfigured after failure of a first link, so that multiple-link failures may be survived. After receipt of an OSPF link state advertisement (LSA) indicating use of a backup path bl after the failure of link l, new backup paths are determined for each impacted link (x,y) that has a backup path sharing one or more links with the backup path bl. The new backup paths are computed while ignoring the failed link l, the impacted link (x,y), and links common to the backup paths b(x,y) and bl. The LSA protocol is modified to accommodate information used in determining whether a link is an impacted link.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.